Trivia: During the scene in the bar with Mystique and the prison guard, the person on the TV is Dr. Hank McCoy - this is the real name of X-Man The Beast.
Trivia: When Tracy is spinning on the playground equipment in the final scene, she is wearing the clothes that Evie wore when they went to the neighbor lifeguard Luke's house. This may be a call back to her missing Evie after she left or a representation of how Tracy's style changed over time. Also, when Tracy wakes up next to Mel in the end she looks disappointed. And I have come to think that she is upset because she wanted to wake up next to Evie again. (00:49:51 - 01:34:51)
Trivia: The tune that Elle Driver is whistling in the hospital is the theme from the movie 'Twisted Nerve' (1968)
Trivia: Monica Bellucci's dress is some what see through. You can see that she isn't wearing underwear. (01:05:10)
Trivia: In Lori's dream, kids teasing a young Jason place a burlap sack on his head, similar to the burlap sack Jason wore in Friday the 13th Part 2. Jason started wearing the goalie mask in Friday the 13th part 3. (00:08:00)
Trivia: Jennifer Garner wore colored contacts for the role of Elektra. Her natural eye color is brown.
Trivia: After the truck with the gold in it, drops from the street and people scatter and scream, there is a man dressed as Spider-Man on the street. (01:25:35)
Trivia: There are lots of signs showing how Evan will die: the doll in the hallway is missing its right eye, the fridge magnets spell 'eye' after one falls off and lastly he has just bought an 'i' Mac computer.
Trivia: In Greek mythology Persephone was the wife of Hades, ruler of Hell. Persephone is the wife of the Merovingian, ruler of the Hell Club.
Trivia: According to the DVD commentary, the entire budget for Underworld was the same as the highway chase scene in The Matrix Reloaded.
Trivia: The face of The Hulk is a computer generated image of Erik Bana, Jennifer Connelly, and director Ang Lee combined into one.
Trivia: When John turns on the magnetic field, the equipment he uses to turn up the power is the throttle of the Saitek X45 with a Cyberdyne plate over the base. (01:22:55)
Trivia: California Govenor and former action star Arnold Schwarzenegger makes a special guest appearance in this movie. When Beck first arrives at the night club, Arnold walks right by him and tells him to "have fun." Arnold had just become Govenor and knew he would not be acting for awhile so this was his way of passing the torch to someone he felt would take his place as the future of action movies.
Trivia: None of the Angels carry or use guns in this sequel because actress Drew Barrymore is a known gun control advocate.
Trivia: Filming of this movie took only eighteen days.
Trivia: No digital- or special effects were used in the film. The actors were in the water with real live sharks.
Suggested correction: You can see the edges of the pool the actors are in when there are "ships" on the horizon.
Not true. The film was shot on location, for three weeks, off the coast of The Bahamas. https://www.nationalgeographic.com/animals/2004/08/open-water-sharks-fear-real/#close.
Trivia: Alison Lohman, who plays Nicolas Cage's teenage (14) daughter, is actually 24.
Trivia: After the girl kills herself the gas station they stop at from the outside looks identical to the gas station in the original. (00:14:50)